package com.sky.controller.user;

import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController("userDishController")
@RequestMapping("/user/dish")
@Slf4j
@Api(tags = "C端-菜品浏览接口")
public class DishController {
    @Autowired
    private DishService dishService;

    @Autowired
    private RedisTemplate redisTemplate;

    @GetMapping("/list")
    public Result<List<DishVO>> list(Long categoryId) {
        log.info("根据分类id批量查询菜品及口味数据:{}",categoryId);
        // 拼接用于缓存菜品数据的key
        String key = "dish_" + categoryId;
        // redis中查询是否已经存在了已缓存的批量菜品数据
        List<DishVO> list = (List<DishVO>) redisTemplate.opsForValue().get(key);
        if (list != null && list.size() > 0) {
            // 若已存在则直接返回而不再继续向下执行
            return Result.success(list);
        }
        // 若不存在则从数据库查询数据并存入redis缓存区
        list = dishService.listWithFlavor(categoryId);
        redisTemplate.opsForValue().set(key,list);
        // 返回数据
        return Result.success(list);
    }
}
